Automatic stop for engines.



No. 655,135. Patented July 3|, [900.1 a. w. TURNER & S.'F. BUTLER.

AUTOMATIC STOP FOR ENGINES.

(Application filed Mar. 17, 1898.) (No Model.) 2 Sheets-Sheet I,

m: norms Pzrcns co puorau'mu, WASHINGTON, o. c.

- Pate'nted luly 3|, 1900. a. w. TURNER va1 s F. BUTLER. AUTUMATICSTDPIFUR ENG|NES.'

, (Application filed Ear. 17, 18 98.) v (No Model.) Z'Sheets-Sheet 2 m:worms warms co PHOTO-MINDY. WASKINGTON. n. c

NITED STATES PATENT CEEicE.

GEORGE w. TURNER AND sMILEY F. BUTLER, OF GLOUCESTER CITY,

- NEW JERSEY.

AUTOMATIC sTo'P FOR ENGINES.

SPECIFICATION forming part of testament no. 655,135, dated July 31,'1900.

v Application filed March 17, 1898.? Serial No. 674,240. (No model.)

T0 whom it may concern.-

Be it known that we, GEORGE WV. TURNER and SMILEY F. BUTLER, citizens ofthe United States, and residents of Gloucester City, Camden county, NewJ ersey,have invented certain Improvements in Stops for Engines, ofwhich the following is a specification. Our invention relates tomechanism controlled and operated automatically by the governor of asteam-engine for stopping instantly the operation of the devicescontrolling the movement of the inlet-valves, so that the supply ofsteam to the cylinder will be cut off. i

The object of our invention is to stop the engine the moment the speedof the same rises above the normal, a condition due either to anincrease of pressure or to a decrease of the load, and as an instance ofthe latter may be mentioned the breaking of a belt. The engine beingrelieved of the drag of the broken belt would tend to increase itsspeed. The mechanism forming the subject of our invention is so combinedwith the governor that as soon as the balls of thesame rise under thecentrifugal action due to increased speed the,

valve-controlling mechanism is tripped and the valve-gear is thrown outof action, remaining so until the engine is started again.

Our invention is fully illustrated in the ac companying drawings, inwhich+ Figure 1 is a side elevation of a portion of a Corlissengine,showing the governor and the mechanism forming the subject of ourinvention. Fig. 2 is a perspective view of the same, and Fig. 3 is adiagram of a modification of our invention.

We have applied and show herewith our improvement in connection with anengine of the Corliss type, although it will be understood and clearlyevident to any one skilled in the art that with but slight modificationour invention may be applied to any form of steam-engine employing aball-governor and automatic cut-ofi valves.

In' the drawings, 1 represents the steamchest of the engine, and 2 thesteam-inlet valves, carried by stems 3,'upon which also are mounted'thedevicesior operating the valves so as to admitsteam to the cylinder.Pivoted to an arm 4, carried at the end of the i stem is a rod 5, at thelower end of which a piston is carried, fitting a dash-pot 6. This rod 5is raised against the pressure of a spring within the dash-pot and whenreleased by the valvegear is retracted by said spring and serves to out01f the steam. The valves are worked from the disk plate 7 at the centerof the steam-chest, rods 8, carried by the same, being connected to arms9 on the sleeve 10, mounted on the stem 3 of the valve. The arm 4 isprovided with a lug 11, with which a spring-hook 12, pivoted to an arm 9on the sleeve 10, is adapted to engage when said sleeve is operated fromthe disk plate 7. Under ordinary conditions this spring-hook 12 engagesthe lug 11 on the arm 4 as the sleeve 10 is rocked and carries the saidrod 5 upward until the heel 12" of the hook is tripped by a projection13, carried by a sleeve 14, held in a predetermined position by means ofa rod 15, connected to an arm 16 on this sleeve and to a two-armedoperating-lever 17, mounted on the governor-pedestal 18. When this lugor projection 13 is in its normal position, the valve-gear serves toopen the inlet-valves regularly and steam is cutofibythesn'dden releaseof the spring-hook 12 and the dropping of the rod 5. This is theordinary manner of operating the inlet-valves of a Corliss engine. Ourinvention consists of certain improved means for tripping the hook 12whenever there is any sudden increase in the speed of the engine,thereby cutting oif the inlet of steam to thecylinder and stopping theengine,' the hook being held in the tripped position until the causeswhich led to the sudden increase in speed have been remedied and theparts have been returned to their normal operative position. i

The mechanism for moving the sleeve 14, carrying the projection 13, soas to bring said projection into engagement with the heel of thespring-hook 12 is as follows: Mounted on the lower part of thegovernor-pedestal 18 is a bracket 19, in which is mounted a. rockshaft20, carrying at one end the two-armed lever 17, at the other end aweighted arm or lever 21, and between the same an arm or lever 22, bywhich connectionf'may be made with the valve-gear of the inlet-valves ofthe high-pressure cylinder of a compound Corliss engine when used withsuch form of engine. The two-armed lever 17 is connected,by means ofrods 15, with the valve-gear of the inletvalves of the cylinder. Theweighted lever 21 is held in the normal position, the weight acting asacounterbalance, by'means of a chain 23, connected to one end of thesame and passing down and around the hub of a raising of the lightarm-of theweighted lever 21. The weight 27, to which the chain 23 isattached, is supported by means of a chain 1 29, wound on a hub 30 of aratchet-pinion 31,

, carriediby a bracket 32, secured at the shottom of thegovernor-pedestal. This pinion is held against turning by a trip-pawl33, to which is attached a chain 34, carried by the heavy end of theweighted lever 21, an adjustable swivel being connected to the chain soas to regulate the amount of movement necessary to trip the pawl 33. Onthe inside of the governor-pedestal is the moving rod, carried up whenthe balls rise, and carriedby this rod isa bar 36, projecting through aslot 37 in-the upper part of the pedestal and connected with theweighted lever 21 by a rod or link 38.

The operation .is as follows: When the governor rises to an undue extentunder increased speed of the engine from any cause whatever, the bar 36is carried up by the moving rod in side the governor-pedestal, and thisbar being connected to the Weighted lever 21 by the link38 the heavy endof the weighted lever 21 is raised. This action trips the pawl 33,

' releasing the ratchet-pinion 31 and the chain 34, carrying. the weight27, and said weight falls, carrying with it the chain 23, secured tothelightend of the weighted'lever 21, and thus retaining the weighted lever21 inthe new position, the ratchet-pinion 24 being held bythe weightedpawl 28. This movement of the weighted lever 21 has changed the posi-.

tion of the two-armed lever 17 and operated thejrods 15, so as to turnthe sleeves "14 to bring the projection 13 into the path of the heel ofthe said spring-hook 15, and thus pre-.

" vent engagement of said hook with the rod 5 andthe admission of steamto the inlet-valves againstmovement by the pawl 33", controlled by theweighted lever 21, being connected to. said lever by achain or cord 34.In this form of lever, substantially asdescribed.

the device the chain 23*,supportingthe weight 27, passes around a drumon the'hub of the ratchet-pinion 24 and is connected to the light end ofthe weighted lever 21. This modified form of the mechanism operates inthe same manner as the mechanism shown in Figs. 1 and 2. When the heavyend of 'the'weighted lever 21 is carried up by the rod 38, the pawl 33is released from its engagement with theteeth 24 of the ratchetpinion 24and allows the-weight 27 to fall, backward rotation of the pinion beingprevented by the engagement of the pawl 28 -with the teeth 24 of thesame.

' Having th'usdeseribed our invention, we

.claim and desire to secure by Letters Patent- 1. The combination of theinlet-valve-operating mechanism of a steam-engine, aweighted lever underpositive control of the governor, and intermediate. devices connected to7 said lever whereby the movement of the same is caused toregulate theclosing of the inlet-valves, with a suspended weight arranged to causethe said governing-lever to be held in a position in which the inlet ofsteam to the engine is prevented, and means operated ed lever underpositive control ofthe governor, and intermediate devices connected tosaid lever whereby the movement of the same valves, with a suspendedweight arranged to cause the said governing-lever to be held in aposition to operate said intermediate devices and cut ofi the inlet of.steam to the en* gine, a retainer for said weight and a trip for saidretainer-connected to the governinglever whereby. when the latter ismoved to a certain position by the governor, the weight will be releasedand act upon the governing- 3. The combination of theinlet-valve-operatin g mechanism of a steam-engine, a weight ed leverunder control of the governor, and intermediate devices whereby themovement of said lever is caused to regulate-the opening oftheinlet-valves, with a suspended weight adapted to moye the said governinglever into position to cut-off the inlet of steam to the engine, saidintermediatedevices comprising a ratchet-pinion 31 mounted at the baseof the governor-pedestal, a drum on the hub of said pinion to which isconnected and wound a chain carrying the weight, a ratchet-pinion 24mounted onthe frame of the engine, a chain also secured to the weightpassing around the hub of said IIO released allowing the weight to dropand act upon the governing-lever, substantially as described.

4. The combination in a device of the character described, of thegovernor-pedestal, a bracket carried by the same, a governor, inlet-valve mechanism, a weighted lever hung to said bracket'andpositively operated by the governor, a two-armed lever operativelysecured to the Weighted lever and connected to the inlet-valvemechanism, a suspended weight connected to one end of thegoverning-lever and adapted to move saidlever into such position thatthe two-armed lever will operate the valve mechanism to cut oi? the

